R5-P8 was an astromech droid owned by the Ohnaka Gang during the Clone Wars. In addition to a unique paint job, the droid was also heavily modified with a blaster pistol mounted atop his head.
R5-P8 firing his head-mounted blaster pistol
R5-P8 was a member of the Ohnaka Gang which was led by Hondo Ohnaka. During the capture of Count Dooku, Jedi Knight Anakin Skywalker, and Jedi Master Obi-Wan Kenobi, R5-P8 was present during the escape.
During the rise of the Galactic Empire, the Ohnaka Gang dissipated, engendering R5 to join a new gang, led by former Ohnaka Gang co-leader Gwarm.
Decades later, during the First Order-Resistance War, Hondo Ohnaka once again gained possession of the droid, who worked as his assistant at Ohnaka Transport Solutions in the Black Spire Outpost on Batuu, though by this time the blaster had been removed from his head.
R5-P8 appears in pre-show scenes of the Star Wars: Galaxy's Edge attraction, Millennium Falcon: Smuggler's Run, before guests board the Millennium Falcon. He can also be heard whistling and beeping one last time before guests leave, as Hondo Ohnaka is going through the damage report of the Falcon.